Significant HVAC energy savings can be achieved by widening the thermostat setpoint range and providing local thermal management to restore occupant comfort. This is achieved through the use of an efficient 50-60 W personal environmental control system designed for the thermal management of the personal microenvironment. Specifically, we analyze the performance of a micro environmental control system that increases occupant’s sensible heat loss in a room maintained at 79F in the summer, and reduces occupant’s heat loss in a room maintained at 66F in the winter. CFD is employed to assess the system performance under different operating conditions.